For example, when I visit Daring Fireball using Chrome, for some reason all of the left hand menu items disappear into a string of empty character symbols (the character you sometimes get in a font if a particular glyph is missing).

The tablix you designed is now displayed in the design surface like this: Product Category Key English Product Category Name Open the smart tags panel of the ReportViewer1 control by clicking the smart-tag glyph on the top right corner.

I am a web designer, and if you used the word glyph in my shop you'd probably be escorted to the door. Character is the term of choice in this industry. Actually, the only times I've ever heard "glyph" used in speech it referred to hieroglyphs or petroglyphs: ancient linguistic units, as opposed to modern high-tech ones.